> ## Documentation Index
> Fetch the complete documentation index at: https://docs.everstrike.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Oracle Page: Watch the Index Price Being Built, Live

> The Oracle page shows how a market's Index Price is calculated right now: every source exchange, which ones are excluded as outliers, and the last 60 seconds.

The [Oracle](https://app.everstrike.io/app/oracle) page shows a market's [Index Price](https://docs.everstrike.io/trading/index-price.md) as it's calculated, live.

## What it shows

* **Index price**: the average of the included sources, after outliers are excluded. It updates every second.
* **Mark price**, the **premium** of the mark over the index, and the **funding rate** per hour.
* **Spread of included sources**: how closely the exchanges agree.
* **Last 60 seconds**: the index and each source's price, with included and excluded sources marked.

## Sources

The **Sources** table lists every source exchange, included ones first, then by distance from the index. Each shows its **price**, its distance **vs index**, and its **status**: included or excluded.

**Constituent exchanges** shows the ten spot exchanges the help centre lists, with the ones currently in the index highlighted.

**Events** lists sources moving in or out of the index while the page is open.

## Why exclude outliers?

So one venue with a flash crash, an outage or a manipulated print can't drag the index. A feed that fails the check drops out before the average is taken. See [Index Price](https://docs.everstrike.io/trading/index-price.md) for the method.

## Choosing a market

Pick any market from the selector. The page also names the WebSocket category it reads, if you want the same data in your own code. See [API Usage Examples](https://docs.everstrike.io/api/usage-examples.md).

> [!TIP]
>
> The [Mark Price](https://docs.everstrike.io/trading/mark-price.md) is built on top of the index. If a position's P/L looks surprising, check the index here first.


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